Slaughter establishments using the sponging method for generic E. coli sampling must use which of the following to analyze results?

• A. Zero tolerance
• B. Statistical Process Control (SPC)
• C. Regulatory performance criteria ("m/M")
• D. Average of all results over the course of a year

Answer: (B)

This item is about how to interpret sanitation indicator data over time. When slaughter establishments use the sponging method to collect generic E. coli samples, the results are managed as a process-control data set. Statistical Process Control (SPC) is the appropriate tool because it focuses on monitoring variation over time, distinguishing normal fluctuation from real shifts that indicate a sanitation problem. Control charts help you see patterns, trends, or outliers, so you can take timely corrective actions before issues become failures.

Zero tolerance would imply every single detection is an outright failure, which isn’t how generic E. coli data are used as a process indicator. Averaging all results over a year hides short-term changes and trends, making it hard to respond to emerging problems. Regulatory performance criteria (m/M) refer to static thresholds and aren’t the ongoing, time-series analysis method SPC provides. So SPC is the best fit to analyze the results.